#include "machdefs.h"

#include <math.h>
#include <iostream.h>

#include "srandgen.h"
#include "tarrinit.h"
#include "array.h"
#include "timing.h"
#include "intflapack.h"


int lpk_rzt_arr(int n);
int lpk_linsolve_mtx(int n);
int lpk_svd_mtx(int l, int c, int wsf, bool covu=true);

static double TOLERANCE = 1.e-6;

int main(int narg, char* arg[])
{

  SophyaInit();
  InitTim();   // Initializing the CPU timer



  if (narg < 2) {
    cout << " lpk - LinAlg/LapackServer test \n" 
	 << " Usage: lpk linsolve/svd/rzt [sizeL,C=5,5] [prtlev=0] \n" 
	 << "             [nprtmax=100] [WorkSpaceSizeFactor=2] \n" 
	 << "   linsolve:  lpk_linsolve_mtx() LapackServer::LinSolve with TMatrix<r_8> \n" 
	 << "   svd:  lpk_svd_mtx() LapackServer::SVD(a,s,u,vt) with TMatrix<r_8> \n" 
	 << "   svds:  lpk_svd_mtx() LapackServer::SVD(a,s); with TMatrix<r_8> \n" 
	 << "   rzt:  lpk_rzt_tarr() rztest_lapack with TArray<r_4> \n" << endl;
    exit(0);
  }
  int l,c;
  l = c = 5;
  int wsf = 2;
  string opt = arg[1];
  if (narg > 2) sscanf(arg[2], "%d,%d", &l, &c); 
  int nprt = 100;
  int prtlev = 1;
  if (narg > 3) prtlev = atoi(arg[3]);
  if (narg > 4) nprt = atoi(arg[4]);
  if (narg > 5) wsf = atoi(arg[5]);

  int rc = 0;
  BaseArray::SetMaxPrint(nprt, prtlev);
  try {
    if (opt == "linsolve") rc = lpk_linsolve_mtx(l);
    else if (opt == "svd") rc = lpk_svd_mtx(l,c,wsf,true);
    else if (opt == "svds") rc = lpk_svd_mtx(l,c,wsf,false);
    else if (opt == "rzt") rc = lpk_rzt_arr(l);
    else { cout << " Unknown option " << opt << " ! " << endl; rc = 66; }
  }
  catch (PThrowable exc) {
    cerr << " catched Exception (lpk.cc) " << exc.Msg() << endl;
    rc = 77;
  }  
  catch (...) {
    cerr << " catched unknown (...) exception (lpk.cc) " << endl; 
    rc = 78; 
  } 
  
  PrtTim(" End of lpk LinAlg/Lapack test ");
  cout << " ---------------  END of Programme -------- (Rc= " 
       << rc << ") --- " << endl;
  return(rc);
}

// -----------------------------------------------------------------------
/* Nouvelle-Fonction */
int lpk_linsolve_mtx(int n)
{
  int i,j;
  BaseArray::SetDefaultMemoryMapping(BaseArray::FortranMemoryMapping);
  cout << " lpk_linsolve_mtx() - Test of LapackServer::LinSolve()  " << endl;
  Matrix a(n,n);
  for(i=0; i<n; i++)
    for(j=0; j<n; j++)  a(j,i) = GauRnd(0., 1.);
  
  Vector x(n), b;
  //  Matrix  x(n,1), b;
  cout << " ------------ Vector X = \n " << x << "\n" << endl; 
  for(i=0; i<n; i++) x(i) = GauRnd(2., 1.5);
  b = a*x;

  cout << " ---- lpk_tmtx() LapackServer::LinSolve Test Using TMatrix<r_8> ----- " << endl; 
  cout << " ------------ Matrix A = \n " << a << "\n" << endl; 
  cout << " ------------ Matrix X = \n " << x << "\n" << endl; 
  cout << " ------------ Matrix B = \n " << b << "\n" << endl; 

  cout << "\n   Calling LapackLinSolve(a,b) .... " << endl;
  PrtTim(" Calling LapackLinSolve(a,b) ");
  LapackLinSolve(a,b);
  PrtTim(" End LapackLinSolve(a,b) ");

  cout << " ------------ Result B(=X ?) = \n " << b << "\n" << endl; 
  Vector diff = b-x;
  PrtTim(" End of Compute(diff)");
  cout << " ------------ Vector diff B-X = \n " << diff << "\n" << endl; 
  double min,max;
  diff.MinMax(min, max);
  cout << " Min/Max difference Vector (?=0) , Min= " << min 
       << " Max= " << max << endl;
  if ((fabs(min) > TOLERANCE) || (fabs(max) > TOLERANCE)) {
    cout << " !!! Difference exceeding tolerance (=" << TOLERANCE << ") !!!" 
	 << endl;
    return(99);
  } 
  return(0);

}

// -----------------------------------------------------------------------
/* Nouvelle-Fonction */
int lpk_svd_mtx(int m, int n, int wsf, bool covu)
{
  BaseArray::SetDefaultMemoryMapping(BaseArray::FortranMemoryMapping);
  cout << " lpk_svd_mtx() - Test of LapackServer::SVD " << endl;
  
  Matrix a(m , n), aa;
  a = RandomSequence(RandomSequence::Gaussian, 0., 4.);
  aa = a;
  Vector s;
  Matrix u, vt;
  cout << " ---- lpk_svd_tmtx() LapackServer::SVD Test Using TMatrix<r_8> ---- " << endl; 
  cout << " ------------ Matrix A = \n " << a << "\n" << endl; 

  cout << "\n   Calling LapackSVD(a,s,u,vt) .... " << endl;
  PrtTim(" Calling LapackSVD() ");
  LapackServer<r_8> lpks;
  lpks.SetWorkSpaceSizeFactor(wsf);
  if (covu) lpks.SVD(aa, s, u, vt);
  else lpks.SVD(aa, s);
  PrtTim(" End LapackSVD() ");

  cout << " ------------ Result S  = \n " << s << "\n" << endl; 
  if (!covu) return(0);
  cout << " ------------ Result U  = \n " << u << "\n" << endl; 
  cout << " ------------ Result VT = \n " << vt << "\n" << endl; 
  Matrix sm(m,n);
  int minmn = (m<n) ? m : n ;
  for(int k=0; k< minmn ; k++) sm(k,k) = s(k);
  Matrix diff = u*(sm*vt) - a;
  PrtTim(" End of Compute(diff)");
  cout << " ------------ Matrix diff U*S*Vt - A = \n " << diff << "\n" << endl; 
  double min,max;
  diff.MinMax(min, max);
  cout << " Min/Max difference Matrix (?=0) , Min= " << min 
       << " Max= " << max << endl;
  if ((fabs(min) > TOLERANCE) || (fabs(max) > TOLERANCE)) {
    cout << " !!! Difference exceeding tolerance (=" << TOLERANCE << ") !!!" 
	 << endl;
    return(99);
  } 
  return(0);

}

void rztest_lapack(TArray<r_4>& aa, TArray<r_4>& bb);

int  lpk_rzt_arr(int n)
{
  int i,j;
  TArray<r_4> a(n,n);
  for(i=0; i<n; i++)
    for(j=0; j<n; j++)  a(i,j,0) = GauRnd(0., 1.);
  
  TArray<r_4> x(n,1), b(n,1);
  r_4 sum ;
  for(i=0; i<n; i++) x(i,0,0) = GauRnd(2., 1.5);
  for(i=0; i<n; i++) {
    sum = 0.;
    for(j=0; j<n; j++) sum +=  a(i,j,0)*x(j,0,0);
    b(i,0,0) = sum;
  }

  //  cout << ":::::::: rztest_lapack - Size=" << n << "  ::::::::: " << endl;
  cout << " ------- lpk_tarr() LapaackTest Using TArray<r_4> -------- " << endl; 
  cout << " ------------ Array A = \n " << a << "\n" << endl; 
  cout << " ------------ Array X = \n " << x << "\n" << endl; 
  cout << " ------------ Array B = \n " << b << "\n" << endl; 

  cout << "\n     Calling rztest_lapack ... " << endl;

  rztest_lapack(a, b);

  cout << " ------------ Result B(=X ?) = \n " << b << "\n" << endl; 
  return(0);
}